碳纤维复合材料与铝合金连接热膨胀影响研究  

Study on the impact of thermal expansion on carbon fiber composite-aluminum alloy connections

作　　者：高阳 周啸尘 周伟旭 王彦翔 刘晓 秦浩 GAO Yang;ZHOU Xiaochen;ZHOU Weixu;WANG Yanxiang;LIU Xiao;QIN Hao(Emerging Technology Research Department,National Engineering Technology and Research Center for System Integration of Railway Vehicle,CRRC Changchun Railway Vehicles Co.,Ltd.,Changchun,Jilin 130062,China)

机构地区：[1]中车长春轨道客车股份有限公司国家轨道客车系统集成工程研究中心新技术研究部,吉林长春130062

出　　处：《机车电传动》2024年第6期50-55,共6页Electric Drive for Locomotives

基　　金：国家重点研发计划项目(2022YFB4301202)。

摘　　要：碳纤维复合材料与铝合金的热膨胀系数存在一定差异,服役温度变化会导致二者产生不同的变形量,造成连接处产生较大应力。文章采用理论分析和仿真相结合方法,针对车体典型工况,研究环境温度分别为常温23℃、高温60℃及低温-40℃时不同热膨胀系数对碳纤维复合材料与铝合金连接性能的影响。结果表明,在典型载荷工况作用下,低温状态时复合材料的拉伸应变、压缩应变及铝合金的应力均为最大值;常温状态时复合材料的拉伸应变、压缩应变及铝合金的应力均为最小值;在高低温状态下,铆钉的拉伸力和剪切力相比常温状态均有所增大,其中高温状态下铆钉受剪切力作用明显,而在低温状态下,铆钉受拉伸力作用明显。The coefficient of thermal expansion differs between carbon fiber composites and aluminum alloys to some extent,leading to varying degrees of deformation under changing service temperatures,which causes significant stress at their connections.Combining theoretical analysis and numerical simulation,this study examined the effect of varying thermal expansion coefficients on the connection performance between carbon fiber composites and aluminum alloys under typical vehicle operating conditions.The study considered the following environmental temperatures:atmospheric temperature at 23°C,high temperature at 60°C,and low temperature at-40°C.The results show that under typical load conditions,both the tensile strain and compressive strain of the composites,as well as the stress in the aluminum alloys,reach their maximum values at the low temperature,while at the atmospheric temperature,these parameters reach their minimum values.At both high and low temperatures,the tensile and shear forces on the rivets increase compared to the states at the atmospheric temperature.Specifically,the rivets are more affected by shear forces at the high temperature and more affected by tensile forces at the low temperature.

关 键 词：动车组 碳纤维复合材料 铝合金 热膨胀系数 仿真分析 

分 类 号：U270.4[机械工程—车辆工程]